干旱胁迫对灵武长枣种植园土壤矿化碳特征的影响

Effects of Drought Stress on Characteristics of Soil Carbon Mineralization in Lingwu Long Jujube Plantation

试验在灵武长枣种植园内设置土壤不同干旱水平,测定土壤理化性质、土壤矿化碳及土壤碳组分,研究不同干旱水平下土壤理化性质及其土壤碳组分与土壤矿化碳之间的关系,探讨不同干旱水平土壤矿化碳的变化特征。结果表明,不同干旱胁迫下土壤矿化碳存在一定的差异,随着干旱胁迫的加剧,土壤矿化碳含量呈下降趋势。且在不同程度的干旱胁迫下,随着土壤pH值、含水率、全氮含量等的增大,土壤矿化碳含量也不断增加;随着土壤全碳含量的增加,土壤矿化碳含量呈递减趋势。

The relationships of soil physical and chemical properties and carbon fractions with soil mineralized carbon and the variation characteristics of soil mineralized carbon in Lingwu long jujube plantation were studied under different drought levels. The results showed that the soil mineralized carbon was different under different drought stress levels, and showed a decrease trend with the intensification of drought stress. With the increase of soil pH value, moisture content and total nitrogen content, the soil mineralized carbon content increased. And the mineralized carbon content of soil decreased with the increase of soil total carbon content.